/*
 * rofi
 *
 * MIT/X11 License
 * Copyright © 2013-2022 Qball Cow <qball@gmpclient.org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

/** The log domain of this dialog. */
#define G_LOG_DOMAIN "Modes.Script"

#include "modes/script.h"
#include "helper.h"
#include "rofi.h"
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>

#include "widgets/textbox.h"

#include "mode-private.h"

#include "rofi-icon-fetcher.h"

#include "modes/dmenuscriptshared.h"

typedef struct {
  /** ID of the current script. */
  unsigned int id;
  /** List of visible items. */
  DmenuScriptEntry *cmd_list;
  /** length list of visible items. */
  unsigned int cmd_list_length;

  /** Urgent list */
  struct rofi_range_pair *urgent_list;
  unsigned int num_urgent_list;
  /** Active list */
  struct rofi_range_pair *active_list;
  unsigned int num_active_list;
  /** Configuration settings. */
  char *message;
  char *prompt;
  char *data;
  gboolean do_markup;
  gboolean keep_selection;
  int64_t new_selection;
  char delim;
  /** no custom */
  gboolean no_custom;

  gboolean use_hot_keys;
} ScriptModePrivateData;

/**
 * Shared function between DMENU and Script mode.
 */
void dmenuscript_parse_entry_extras(G_GNUC_UNUSED Mode *sw,
                                    DmenuScriptEntry *entry, char *buffer,
                                    G_GNUC_UNUSED size_t length) {
  gchar **extras = g_strsplit(buffer, "\x1f", -1);
  gchar **extra;
  for (extra = extras; *extra != NULL && *(extra + 1) != NULL; extra += 2) {
    gchar *key = *extra;
    gchar *value = *(extra + 1);
    if (strcasecmp(key, "icon") == 0) {
      entry->icon_name = value;
    } else if (strcasecmp(key, "meta") == 0) {
      entry->meta = value;
    } else if (strcasecmp(key, "info") == 0) {
      entry->info = value;
    } else if (strcasecmp(key, "nonselectable") == 0) {
      entry->nonselectable = strcasecmp(value, "true") == 0;
      g_free(value);
    } else {
      g_free(value);
    }
    g_free(key);
  }
  g_free(extras);
}

/**
 * End of shared functions.
 */

static void parse_header_entry(Mode *sw, char *line, ssize_t length) {
  ScriptModePrivateData *pd = (ScriptModePrivateData *)sw->private_data;
  ssize_t length_key = 0; // strlen ( line );
  while (length_key < length && line[length_key] != '\x1f') {
    length_key++;
  }

  if ((length_key + 1) < length) {
    line[length_key] = '\0';
    char *value = line + length_key + 1;
    if (strcasecmp(line, "message") == 0) {
      g_free(pd->message);
      pd->message = strlen(value) ? g_strdup(value) : NULL;
    } else if (strcasecmp(line, "prompt") == 0) {
      g_free(pd->prompt);
      pd->prompt = g_strdup(value);
      sw->display_name = pd->prompt;
    } else if (strcasecmp(line, "markup-rows") == 0) {
      pd->do_markup = (strcasecmp(value, "true") == 0);
    } else if (strcasecmp(line, "urgent") == 0) {
      parse_ranges(value, &(pd->urgent_list), &(pd->num_urgent_list));
    } else if (strcasecmp(line, "active") == 0) {
      parse_ranges(value, &(pd->active_list), &(pd->num_active_list));
    } else if (strcasecmp(line, "delim") == 0) {
      pd->delim = helper_parse_char(value);
    } else if (strcasecmp(line, "no-custom") == 0) {
      pd->no_custom = (strcasecmp(value, "true") == 0);
    } else if (strcasecmp(line, "use-hot-keys") == 0) {
      pd->use_hot_keys = (strcasecmp(value, "true") == 0);
    } else if (strcasecmp(line, "keep-selection") == 0) {
      pd->keep_selection = (strcasecmp(value, "true") == 0);
    } else if (strcasecmp(line, "new-selection") == 0) {
      pd->new_selection = (int64_t)g_ascii_strtoll(value, NULL, 0);
    } else if (strcasecmp(line, "data") == 0) {
      g_free(pd->data);
      pd->data = g_strdup(value);
    } else if (strcasecmp(line, "theme") == 0) {
      if (rofi_theme_parse_string((const char *)value)) {
        g_warning("Failed to parse: '%s'", value);
        rofi_clear_error_messages();
      }
    }
  }
}

static DmenuScriptEntry *execute_executor(Mode *sw, char *arg,
                                          unsigned int *length, int value,
                                          DmenuScriptEntry *entry) {
  ScriptModePrivateData *pd = (ScriptModePrivateData *)sw->private_data;
  int fd = -1;
  GError *error = NULL;
  DmenuScriptEntry *retv = NULL;
  char **argv = NULL;
  int argc = 0;
  *length = 0;
  // Reset these between runs.
  pd->new_selection = -1;
  pd->keep_selection = -1;
  // Environment
  char **env = g_get_environ();

  char *str_value = g_strdup_printf("%d", value);
  env = g_environ_setenv(env, "ROFI_RETV", str_value, TRUE);
  g_free(str_value);

  str_value = g_strdup_printf("%d", (int)getpid());
  env = g_environ_setenv(env, "ROFI_OUTSIDE", str_value, TRUE);
  g_free(str_value);

  if (entry && entry->info) {
    env = g_environ_setenv(env, "ROFI_INFO", entry->info, TRUE);
  }
  if (pd->data) {
    env = g_environ_setenv(env, "ROFI_DATA", pd->data, TRUE);
  }

  if (g_shell_parse_argv(sw->ed, &argc, &argv, &error)) {
    argv = g_realloc(argv, (argc + 2) * sizeof(char *));
    argv[argc] = g_strdup(arg);
    argv[argc + 1] = NULL;
    g_spawn_async_with_pipes(NULL, argv, env, G_SPAWN_SEARCH_PATH, NULL, NULL,
                             NULL, NULL, &fd, NULL, &error);
  }
  g_strfreev(env);
  if (error != NULL) {
    char *msg = g_strdup_printf("Failed to execute: '%s'\nError: '%s'",
                                (char *)sw->ed, error->message);
    rofi_view_error_dialog(msg, FALSE);
    g_free(msg);
    // print error.
    g_error_free(error);
    fd = -1;
  }
  if (fd >= 0) {
    FILE *inp = fdopen(fd, "r");
    if (inp) {
      char *buffer = NULL;
      size_t buffer_length = 0;
      ssize_t read_length = 0;
      size_t actual_size = 0;
      while ((read_length = getdelim(&buffer, &buffer_length, pd->delim, inp)) >
             0) {
        // Filter out line-end.
        if (buffer[read_length - 1] == pd->delim) {
          buffer[read_length - 1] = '\0';
        }
        if (buffer[0] == '\0') {
          parse_header_entry(sw, &buffer[1], read_length - 1);
        } else {
          if (actual_size < ((*length) + 2)) {
            actual_size += 256;
            retv = g_realloc(retv, (actual_size) * sizeof(DmenuScriptEntry));
          }
          if (retv) {
            size_t buf_length = strlen(buffer) + 1;
#if GLIB_CHECK_VERSION(2, 68, 0)
            retv[(*length)].entry = g_memdup2(buffer, buf_length);
#else
            retv[(*length)].entry = g_memdup(buffer, buf_length);
#endif
            retv[(*length)].icon_name = NULL;
            retv[(*length)].meta = NULL;
            retv[(*length)].info = NULL;
            retv[(*length)].icon_fetch_uid = 0;
            retv[(*length)].icon_fetch_size = 0;
            retv[(*length)].nonselectable = FALSE;
            if (buf_length > 0 && (read_length > (ssize_t)buf_length)) {
              dmenuscript_parse_entry_extras(sw, &(retv[(*length)]),
                                             buffer + buf_length,
                                             read_length - buf_length);
            }
            retv[(*length) + 1].entry = NULL;
            (*length)++;
          }
        }
      }
      if (buffer) {
        free(buffer);
      }
      if (fclose(inp) != 0) {
        g_warning("Failed to close stdout off executor script: '%s'",
                  g_strerror(errno));
      }
    }
  }
  g_strfreev(argv);
  return retv;
}

static void script_switcher_free(Mode *sw) {
  if (sw == NULL) {
    return;
  }
  g_free(sw->name);
  g_free(sw->ed);
  g_free(sw);
}

static int script_mode_init(Mode *sw) {
  if (sw->private_data == NULL) {
    ScriptModePrivateData *pd = g_malloc0(sizeof(*pd));
    pd->delim = '\n';
    sw->private_data = (void *)pd;
    pd->cmd_list = execute_executor(sw, NULL, &(pd->cmd_list_length), 0, NULL);
  }
  return TRUE;
}
static unsigned int script_mode_get_num_entries(const Mode *sw) {
  const ScriptModePrivateData *rmpd =
      (const ScriptModePrivateData *)sw->private_data;
  return rmpd->cmd_list_length;
}

static void script_mode_reset_highlight(Mode *sw) {
  ScriptModePrivateData *rmpd = (ScriptModePrivateData *)sw->private_data;

  rmpd->num_urgent_list = 0;
  g_free(rmpd->urgent_list);
  rmpd->urgent_list = NULL;
  rmpd->num_active_list = 0;
  g_free(rmpd->active_list);
  rmpd->active_list = NULL;
}

static ModeMode script_mode_result(Mode *sw, int mretv, char **input,
                                   unsigned int selected_line) {
  ScriptModePrivateData *rmpd = (ScriptModePrivateData *)sw->private_data;
  ModeMode retv = MODE_EXIT;
  DmenuScriptEntry *new_list = NULL;
  unsigned int new_length = 0;

  if ((mretv & MENU_CUSTOM_COMMAND)) {
    if (rmpd->use_hot_keys) {
      script_mode_reset_highlight(sw);
      if (selected_line != UINT32_MAX) {
        new_list = execute_executor(sw, rmpd->cmd_list[selected_line].entry,
                                    &new_length, 10 + (mretv & MENU_LOWER_MASK),
                                    &(rmpd->cmd_list[selected_line]));
      } else {
        if (rmpd->no_custom == FALSE) {
          new_list = execute_executor(sw, *input, &new_length,
                                      10 + (mretv & MENU_LOWER_MASK), NULL);
        } else {
          return RELOAD_DIALOG;
        }
      }
    } else {
      retv = (mretv & MENU_LOWER_MASK);
      return retv;
    }
  } else if ((mretv & MENU_OK) && rmpd->cmd_list[selected_line].entry != NULL) {
    if (rmpd->cmd_list[selected_line].nonselectable) {
      return RELOAD_DIALOG;
    }
    script_mode_reset_highlight(sw);
    new_list =
        execute_executor(sw, rmpd->cmd_list[selected_line].entry, &new_length,
                         1, &(rmpd->cmd_list[selected_line]));
  } else if ((mretv & MENU_CUSTOM_INPUT) && *input != NULL &&
             *input[0] != '\0') {
    if (rmpd->no_custom == FALSE) {
      script_mode_reset_highlight(sw);
      new_list = execute_executor(sw, *input, &new_length, 2, NULL);
    } else {
      return RELOAD_DIALOG;
    }
  }

  // If a new list was generated, use that an loop around.
  if (new_list != NULL) {
    for (unsigned int i = 0; i < rmpd->cmd_list_length; i++) {
      g_free(rmpd->cmd_list[i].entry);
      g_free(rmpd->cmd_list[i].icon_name);
      g_free(rmpd->cmd_list[i].meta);
    }
    g_free(rmpd->cmd_list);

    rmpd->cmd_list = new_list;
    rmpd->cmd_list_length = new_length;
    if (rmpd->keep_selection) {
      if (rmpd->new_selection >= 0 &&
          rmpd->new_selection < rmpd->cmd_list_length) {
        rofi_view_set_selected_line(rofi_view_get_active(),
                                    rmpd->new_selection);
      } else {
        rofi_view_set_selected_line(rofi_view_get_active(), selected_line);
      }
      g_free(*input);
      *input = NULL;
      retv = RELOAD_DIALOG;
    } else {
      retv = RESET_DIALOG;
    }
  }
  return retv;
}

static void script_mode_destroy(Mode *sw) {
  ScriptModePrivateData *rmpd = (ScriptModePrivateData *)sw->private_data;
  if (rmpd != NULL) {
    for (unsigned int i = 0; i < rmpd->cmd_list_length; i++) {
      g_free(rmpd->cmd_list[i].entry);
      g_free(rmpd->cmd_list[i].icon_name);
      g_free(rmpd->cmd_list[i].meta);
    }
    g_free(rmpd->cmd_list);
    g_free(rmpd->message);
    g_free(rmpd->prompt);
    g_free(rmpd->data);
    g_free(rmpd->urgent_list);
    g_free(rmpd->active_list);
    g_free(rmpd);
    sw->private_data = NULL;
  }
}
static inline unsigned int get_index(unsigned int length, int index) {
  if (index >= 0) {
    return index;
  }
  if (((unsigned int)-index) <= length) {
    return length + index;
  }
  // Out of range.
  return UINT_MAX;
}
static char *_get_display_value(const Mode *sw, unsigned int selected_line,
                                G_GNUC_UNUSED int *state,
                                G_GNUC_UNUSED GList **list, int get_entry) {
  ScriptModePrivateData *pd = sw->private_data;
  for (unsigned int i = 0; i < pd->num_active_list; i++) {
    unsigned int start =
        get_index(pd->cmd_list_length, pd->active_list[i].start);
    unsigned int stop = get_index(pd->cmd_list_length, pd->active_list[i].stop);
    if (selected_line >= start && selected_line <= stop) {
      *state |= ACTIVE;
    }
  }
  for (unsigned int i = 0; i < pd->num_urgent_list; i++) {
    unsigned int start =
        get_index(pd->cmd_list_length, pd->urgent_list[i].start);
    unsigned int stop = get_index(pd->cmd_list_length, pd->urgent_list[i].stop);
    if (selected_line >= start && selected_line <= stop) {
      *state |= URGENT;
    }
  }
  if (pd->do_markup) {
    *state |= MARKUP;
  }
  return get_entry ? g_strdup(pd->cmd_list[selected_line].entry) : NULL;
}

static int script_token_match(const Mode *sw, rofi_int_matcher **tokens,
                              unsigned int index) {
  ScriptModePrivateData *rmpd = sw->private_data;
  int match = 1;
  if (tokens) {
    for (int j = 0; match && tokens[j] != NULL; j++) {
      rofi_int_matcher *ftokens[2] = {tokens[j], NULL};
      int test = 0;
      test = helper_token_match(ftokens, rmpd->cmd_list[index].entry);
      if (test == tokens[j]->invert && rmpd->cmd_list[index].meta) {
        test = helper_token_match(ftokens, rmpd->cmd_list[index].meta);
      }

      if (test == 0) {
        match = 0;
      }
    }
  }
  return match;
}
static char *script_get_message(const Mode *sw) {
  ScriptModePrivateData *pd = sw->private_data;
  return g_strdup(pd->message);
}
static cairo_surface_t *script_get_icon(const Mode *sw,
                                        unsigned int selected_line,
                                        unsigned int height) {
  ScriptModePrivateData *pd =
      (ScriptModePrivateData *)mode_get_private_data(sw);
  g_return_val_if_fail(pd->cmd_list != NULL, NULL);
  DmenuScriptEntry *dr = &(pd->cmd_list[selected_line]);
  if (dr->icon_name == NULL) {
    return NULL;
  }
  if (dr->icon_fetch_uid > 0 && dr->icon_fetch_size == height) {
    return rofi_icon_fetcher_get(dr->icon_fetch_uid);
  }
  dr->icon_fetch_uid = rofi_icon_fetcher_query(dr->icon_name, height);
  dr->icon_fetch_size = height;
  return rofi_icon_fetcher_get(dr->icon_fetch_uid);
}

#include "mode-private.h"

typedef struct ScriptUser {
  char *name;
  char *path;
} ScriptUser;

ScriptUser *user_scripts = NULL;
size_t num_scripts = 0;

void script_mode_cleanup(void) {
  for (size_t i = 0; i < num_scripts; i++) {
    g_free(user_scripts[i].name);
    g_free(user_scripts[i].path);
  }
  g_free(user_scripts);
}
void script_mode_gather_user_scripts(void) {
  const char *cpath = g_get_user_config_dir();
  char *script_dir = g_build_filename(cpath, "rofi", "scripts", NULL);
  if (g_file_test(script_dir, G_FILE_TEST_EXISTS | G_FILE_TEST_IS_DIR) ==
      FALSE) {
    g_free(script_dir);
    return;
  }
  GDir *sd = g_dir_open(script_dir, 0, NULL);
  if (sd) {
    const char *file = NULL;
    while ((file = g_dir_read_name(sd)) != NULL) {
      char *sp = g_build_filename(cpath, "rofi", "scripts", file, NULL);
      user_scripts =
          g_realloc(user_scripts, sizeof(ScriptUser) * (num_scripts + 1));
      user_scripts[num_scripts].path = sp;
      user_scripts[num_scripts].name = g_strdup(file);
      char *dot = strrchr(user_scripts[num_scripts].name, '.');
      if (dot) {
        *dot = '\0';
      }
      num_scripts++;
    }
  }

  g_free(script_dir);
}

static int script_mode_has_user_script(char const *const user) {

  for (size_t i = 0; i < num_scripts; i++) {
    if (g_strcmp0(user_scripts[i].name, user) == 0) {
      return i;
    }
  }
  return -1;
}

Mode *script_mode_parse_setup(const char *str) {
  int ui = 0;
  if ((ui = script_mode_has_user_script(str)) >= 0) {
    Mode *sw = g_malloc0(sizeof(*sw));
    sw->name = g_strdup(user_scripts[ui].name);
    sw->ed = g_strdup(user_scripts[ui].path);
    sw->free = script_switcher_free;
    sw->_init = script_mode_init;
    sw->_get_num_entries = script_mode_get_num_entries;
    sw->_result = script_mode_result;
    sw->_destroy = script_mode_destroy;
    sw->_token_match = script_token_match;
    sw->_get_message = script_get_message;
    sw->_get_icon = script_get_icon;
    sw->_get_completion = NULL, sw->_preprocess_input = NULL,
    sw->_get_display_value = _get_display_value;
    return sw;
  }
  Mode *sw = g_malloc0(sizeof(*sw));
  char *endp = NULL;
  char *parse = g_strdup(str);
  unsigned int index = 0;
  const char *const sep = ":";
  for (char *token = strtok_r(parse, sep, &endp); token != NULL;
       token = strtok_r(NULL, sep, &endp)) {
    if (index == 0) {
      sw->name = g_strdup(token);
    } else if (index == 1) {
      sw->ed = (void *)rofi_expand_path(token);
    }
    index++;
  }
  g_free(parse);
  if (index == 2) {
    sw->free = script_switcher_free;
    sw->_init = script_mode_init;
    sw->_get_num_entries = script_mode_get_num_entries;
    sw->_result = script_mode_result;
    sw->_destroy = script_mode_destroy;
    sw->_token_match = script_token_match;
    sw->_get_message = script_get_message;
    sw->_get_icon = script_get_icon;
    sw->_get_completion = NULL, sw->_preprocess_input = NULL,
    sw->_get_display_value = _get_display_value;

    return sw;
  }
  fprintf(
      stderr,
      "The script command '%s' has %u options, but needs 2: <name>:<script>.",
      str, index);
  script_switcher_free(sw);
  return NULL;
}

gboolean script_mode_is_valid(const char *token) {
  if (script_mode_has_user_script(token) >= 0) {
    return TRUE;
  }
  return strchr(token, ':') != NULL;
}

void script_user_list(gboolean is_term) {

  for (unsigned int i = 0; i < num_scripts; i++) {
    printf("        • %s%s%s (%s)\n", is_term ? (color_bold) : "",
           user_scripts[i].name, is_term ? color_reset : "",
           user_scripts[i].path);
  }
}